ZXing (pronounced "zebra crossing") is an open-source, multi-format
1D/2D barcode image processing library. It currently supports these
formats:

 - UPC-A and UPC-E
 - EAN-8 and EAN-13
 - Data Matrix
 - Code 39
 - Code 93
 - Code 128
 - ITF
 - Codabar
 - RSS-14 (all variants)
 - QR Code
 - Data Matrix
 - Aztec
 - PDF 417
